Here we go with a Bitcoin lesson we had last time. Take a look at the resources:
A video we watched:
https://youtu.be/UnExjakUlQg
A 6 minutes English listening on gun control:
http://www.bbc.co.uk/learningenglish/english/features/6-minute-english/ep-170223
A list of for and against arguments on gun control:
https://gun-control.procon.org